Valve of wireless transmission systems



C. E. HIATT AND W. J. DAVIS. VALVE OF WIRELESS TRANSMISSION SYSTEMS.

APPLICATION FILED MAY 19, 1919 Patented; Oct. 18, 1921 UNITED; STATES PATENT OFFICE.

CASSIUS EUGENE .HIAT'I AND WILLIAM JOSEPH DAVIS, OFLONDON, ENGLAND.

I To all whom it may concern:

- Be it known that we, CAssIUs EUonNnbetween the sheath or IATT and WILLIAMQJOSEPH DAVIS, a citizen of the United States of America and a subject of the King of Great Britain, reipectively, ngland, have invented useful Improvements in Transmis'slon Systems, e an application in 1912 Patent N 129,051,)

certain new and Valves of Wireless for which I have ngland April 15, of which the folowing is a specification. 1s invention relates to, the valves of t wireless transmission systems, and is applicable in particular to War Oflice R.,

4, Navy T and other types of valves. lves consist in general of a filament or cathode, which is the generator of e electrons surrounded by a coiled grid while outside the grid and concentric with it is a sheath or plate forming the anode which is the collector of the elsctronsf-of gas freed nickel, the whole being contained and su ported in a bulb ig egree of vacuum and sheath support the bulb s at support within usually known as the stem.

ydrogen and is hen the spot welding process e atmosphere is employed, it will b ciated that our invention is even more advantageous. v

The object of our invention is to'provide a structure of increased rigidity in which and both residents of London, b

' results and OF WIRELESS TRANSMISSION SYSTEMS.

Patented Oct. 18, 1921.

a, 1921, 41 smr. L., 1313. there will be a higher thermal conductivity plate and its sup-. port and at the same time'provide a less expensive process of manufacture than hitherto obtaining, the invention consists road an integral section adapted to eitherconstitute the support and be directly is a perspectlve view of a complete valve, the glass bulb being broken away for conis an end view, and Fi curved cross section and so located that when the sheath or plate is rolled into its cylindrical form this extension forms the support, its free end being connected to the electrical lead 3 and embedded in the glass support or stem 4 within the bulb 5. The

lament or cathode 7 and coiled grid 8 are disposed within the usual wa d b h the filament 7 being porte y t e legs 9. Alternatively ribbon extension 2 aforesaid, instead of itself belng connected to the lead 1n the glass support or stem is or made to emb and embedded wound around race the usual metal supportis compressed or engagement with the post as indicated in Fig. 4 of the drawings. By either method t e process of electric welding 1s obviated and "there is an increased thermal conductivity whereby the plate support is at an elevated temperature during the usual exhausting process thereby freeing the plate support from detrimental gases in much the same fashion as the plate itself is freed degree since of the sheath or anode l in 1 a I'lg'id' structure course the support will'not attain the same extension embedded in the glass support temperature as the plate itself. Within the bulb, said extension supporting What We claim and desire to secure by said anode and serving for connection to 10 Letters Patent 1s:- the electrical lead. 5 In a valve for Wireless telegraph sys- In Witness whereof We aflix our si natures. terms including a bulb, an anode in the form CASSIUS EUGENE H ATI.

of a spirally wound plate having an integral WILLIAM OSEPH DAVIS. 

